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利用我国9个中低纬度的电离层观测站在1977-1986年间观测的f0F2月中值，按每月的平均地磁活动指数Ap分为地磁活动高（Ap≥5）和低（Ap＜15）两种情况，研究了地磁活动对f0F2月中值平均低纬电离层驼峰区演变的影响，并考察了国际参考电离层（IRI）的误差．
According to monthly average geomagnetic activity index Ap, geomagnetic activity was high (Ap≥5) and low (Ap <15) using the observed middle f0F2 values of 9 ionospheric stations at middle and low latitudes between 1977 and 1986, In both cases, the effects of geomagnetic activity on the conservation of local medium-frequency variability in mid-f0F2 are studied and the errors of the international reference ionosphere (IRI) are investigated.